Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4413c1f7a528e61f1ea1776c20fd12b3bcbcfc56b112f9dbad087761b6d9cbb6' 
  AND token = 'LISv/rygsM+tWWoFv63i3SpWgCwLVQ7dqiZrzc5847U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}